1) The document discusses experiments conducted to optimize the efficiency of a fluidized bed classifier (FBC) used in mineral separation processes. 2) Varying the bed level and feed direction in the FBC, samples were collected and analyzed. Lowering the bed level and changing the feed direction improved separation efficiency. 3) The optimum separation was obtained at the lowest bed level of 10 tested. Efficiency increased from 6.68% to 15.88% based on calculations using Littler's equation.